Apple has said that developers will be treated to an "in-depth look" at the future of iOS and OS X during WWDC, which we expect means the unveiling of iOS 7 and OS X 10.9. Apple could also use WWDC 2013 to launch new Macs, including a new Mac Pro, as well as MacBook Pro and MacBook Air lineup refreshes.

All 5000 tickets for WWDC, which set developers back more than £1000 each, sold within two minutes of going on sale in April, a new record for Apple. Last year, it took around two hours for the tickets to sell out.